Abstract
A field experiment was conducted to study the population dynamics of aphid, Myzus persicae (Sulz.) and to see the effect of sowing dates. Cumin variety Gujarat Cumin 4 (GC-4) was grown during rabi 2020-21. The incidence and population fluctuation was dependent on the weather parameters. The incidence initiated in third week of December (51st Standard Meteorological Week-SMW). Initially, incidence was low (6.00 aphids/three umbels) but it gradually increased and reached the peak in last week of January i.e. 5th SMW (115.03 aphids/three umbels). The early sown crop (26th October) had the minimum infestation (68.00 aphid/3 umbels) of aphids and highest seed yield (4.90 q/ ha) was obtained as compared to the late sowing crop on 7th December (106.50 aphids/ umbels) with minimum seed yield (3.10 q/ ha).
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